⚠️ Severe Thunderstorm Watch – Adair, IA; Adams, IA; Audubon, IA; Boone, IA; Carroll, IA; Cass, IA; Clarke, IA; Crawford, IA; Dallas, IA; Decatur, IA; Greene, IA; Guthrie, IA; Madison, IA; Polk, IA; Ringgold, IA; Taylor, IA; Union, IA; Warren, IA – Wednesday, August 12, 2026

Severe Thunderstorm Watch issued August 12 at 2:27AM CDT until August 12 at 10:00AM CDT by NWS Des Moines IA

Details

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
573 IN EFFECT UNTIL 10 AM CDT THIS MORNING FOR THE FOLLOWING
AREAS

IN IOWA THIS WATCH INCLUDES 18 COUNTIES

IN CENTRAL IOWA

BOONE DALLAS POLK

IN SOUTH CENTRAL IOWA

CLARKE DECATUR MADISON
RINGGOLD UNION WARREN

IN SOUTHWEST IOWA

ADAIR ADAMS CASS
TAYLOR

IN WEST CENTRAL IOWA

AUDUBON CARROLL CRAWFORD
GREENE GUTHRIE

THIS INCLUDES THE CITIES OF ADAIR, ADEL, ATLANTIC, AUDUBON,
BAYARD, BEDFORD, BOONE, CARLISLE, CARROLL, CASEY, CORNING,
CRESTON, DENISON, DES MOINES, EARLHAM, EXIRA, FONTANELLE,
GREENFIELD, GUTHRIE CENTER, INDIANOLA, JEFFERSON, LAMONI, LENOX,
LEON, MOUNT AYR, NEW MARKET, NORWALK, OSCEOLA, PANORA, PERRY,
STUART, WAUKEE, AND WINTERSET.

* PRIMARY THREATS INCLUDE…

SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 80 MPH POSSIBLE.
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE.

PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES : <05%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : <02%
PROB OF 10 OR MORE SEVERE WIND EVENTS : 70%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : 50%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : 20%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 10%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : >95%
MEAN STORM MOTION /MPH/ : E 45

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.